THE ARCH Q503 INTERIOR
When it comes to interior space the ARCH Q503 may not be anywhere near the SYNCRO Q704 but it's still quite spacious.
At the front you can mount a radiator up to roughly 35mm in thickness.
The PSU shroud is perforated since Seasonic has made it that you can mount two 120mm fans on it.
5 rubber grommets and a large CPU cut-out are located on the motherboard tray.
Behind the motherboard tray we find the CONNECT module and next to it an 3.5" drive cage (you can place an 3.5" drive inside and either an 3.5" or an 2.5" drive on top) and a vertical steel drive tray (this has room for either two 2.5" drives or a single 3.5" one).